Home / 21,411.64-29,540.85-12,451.78

Finding the Fourth Proportional to 21,411.64, 29,540.85 and 12,451.78

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Solution

The fourth proportional to 21,411.64, 29,540.85 and 12,451.78 is: 17,179.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,411.64 : 29,540.85 = 12,451.78 : x
  2. Step 2: Convert to fraction form
    21,411.64/29,540.85 = 12,451.78/x
  3. Step 3: Cross multiply
    21,411.64x = 29,540.85 × 12,451.78
  4. Step 4: Simplify right side
    21,411.64x = 367,836,165.21
  5. Step 5: Solve for x
    x = 367,836,165.21/21,411.64
  6. Step 6: Final answer
    x = 17,179.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.